Application: ksysguard ()
 (Compiled from sources)
Qt Version: 5.4.0
Operating System: Linux 3.12.2-pf x86_64
Distribution: "NAME=Gentoo"

-- Information about the crash:
- What I was doing when the application crashed:
Right click on any process item and select "Detailed Memory Information" in popup
- Custom settings of the application:
Built with QT5.4

The crash can be reproduced every time.



Reproducible: Always

Steps to Reproduce:
1. Open System Monitor
2. Right click on any process item
3. select "Detailed Memory Information" in popup

Actual Results:  
kde crash nandler

Expected Results:  
no crash, some window opening

-- Backtrace:
Application: System Monitor (ksysguard), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f97301107c0 (LWP 6414))]

Thread 2 (Thread 0x7f9713a18700 (LWP 6415)):
#0  0x00007f972fa49d2d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f97224d71e2 in ?? () from /usr/lib64/libxcb.so.1
#2  0x00007f97224d8de7 in xcb_wait_for_event () from /usr/lib64/libxcb.so.1
#3  0x00007f9715f7cdf9 in QXcbEventReader::run() () from /usr/lib64/qt5/plugins/platforms/libqxcb.so
#4  0x00007f972b1fcd85 in QThreadPrivate::start(void*) () from /usr/lib64/libQt5Core.so.5
#5  0x00007f97220b3f3a in start_thread (arg=0x7f9713a18700) at pthread_create.c:308
#6  0x00007f972fa539ad in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 1 (Thread 0x7f97301107c0 (LWP 6414)):
[KCrash Handler]
#5  0x00007f972870143c in WTFCrash () at wtf/Assertions.cpp:345
#6  0x00007f9727cd2494 in WebCore::ApplicationCacheStorage::setCacheDirectory(WTF::String const&) () at ../WTF/wtf/text/StringImpl.h:617
#7  0x00007f9726416109 in QWebSettings::setOfflineWebApplicationCachePath(QString const&) () at ./wtf/Vector.h:910
#8  0x00007f972f7506de in Scripting::runScript(QString const&, QString const&) () from /usr/lib64/libprocessui.so.5
#9  0x00007f972f750adf in Scripting::runScriptSlot() () from /usr/lib64/libprocessui.so.5
#10 0x00007f972b3d3a37 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib64/libQt5Core.so.5
#11 0x00007f972c514452 in QAction::triggered(bool) () from /usr/lib64/libQt5Widgets.so.5
#12 0x00007f972c5166f9 in QAction::activate(QAction::ActionEvent) () from /usr/lib64/libQt5Widgets.so.5
#13 0x00007f972c681f6a in QMenuPrivate::activateCausedStack(QList<QPointer<QWidget> > const&, QAction*, QAction::ActionEvent, bool) () from /usr/lib64/libQt5Widgets.so.5
#14 0x00007f972c687149 in QMenuPrivate::activateAction(QAction*, QAction::ActionEvent, bool) () from /usr/lib64/libQt5Widgets.so.5
#15 0x00007f972c68addc in QMenu::mouseReleaseEvent(QMouseEvent*) () from /usr/lib64/libQt5Widgets.so.5
#16 0x00007f972c55dba2 in QWidget::event(QEvent*) () from /usr/lib64/libQt5Widgets.so.5
#17 0x00007f972c688d4b in QMenu::event(QEvent*) () from /usr/lib64/libQt5Widgets.so.5
#18 0x00007f972c51d381 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib64/libQt5Widgets.so.5
#19 0x00007f972c520370 in QApplication::notify(QObject*, QEvent*) () from /usr/lib64/libQt5Widgets.so.5
#20 0x00007f972b3a5a3e in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib64/libQt5Core.so.5
#21 0x00007f972c52291b in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool) () from /usr/lib64/libQt5Widgets.so.5
#22 0x00007f972c57d391 in QWidgetWindow::handleMouseEvent(QMouseEvent*) () from /usr/lib64/libQt5Widgets.so.5
#23 0x00007f972c57e303 in QWidgetWindow::event(QEvent*) () from /usr/lib64/libQt5Widgets.so.5
#24 0x00007f972c51d381 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib64/libQt5Widgets.so.5
#25 0x00007f972c51fec3 in QApplication::notify(QObject*, QEvent*) () from /usr/lib64/libQt5Widgets.so.5
#26 0x00007f972b3a5a3e in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib64/libQt5Core.so.5
#27 0x00007f972bdd55b0 in QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent*) () from /usr/lib64/libQt5Gui.so.5
#28 0x00007f972bdd7e55 in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () from /usr/lib64/libQt5Gui.so.5
#29 0x00007f972bdc27f8 in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Gui.so.5
#30 0x00007f9715fab4b0 in userEventSourceDispatch(_GSource*, int (*)(void*), void*) () from /usr/lib64/qt5/plugins/platforms/libqxcb.so
#31 0x00007f972038c194 in g_main_dispatch (context=0x7f970c003000) at /var/tmp/portage/dev-libs/glib-2.40.0-r1/work/glib-2.40.0/glib/gmain.c:3064
#32 g_main_context_dispatch (context=context@entry=0x7f970c003000) at /var/tmp/portage/dev-libs/glib-2.40.0-r1/work/glib-2.40.0/glib/gmain.c:3663
#33 0x00007f972038c3c8 in g_main_context_iterate (context=context@entry=0x7f970c003000, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /var/tmp/portage/dev-libs/glib-2.40.0-r1/work/glib-2.40.0/glib/gmain.c:3734
#34 0x00007f972038c484 in g_main_context_iteration (context=0x7f970c003000, may_block=1) at /var/tmp/portage/dev-libs/glib-2.40.0-r1/work/glib-2.40.0/glib/gmain.c:3795
#35 0x00007f972b3faa6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#36 0x00007f972b3a413b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#37 0x00007f972b3ab9a5 in QCoreApplication::exec() () from /usr/lib64/libQt5Core.so.5
#38 0x00007f972fd84fcf in kdemain () from /usr/lib64/libkdeinit5_ksysguard.so
#39 0x00007f972f98abf5 in __libc_start_main (main=0x400860 <main>, argc=1, ubp_av=0x7fff23708018, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff23708008) at libc-start.c:258
#40 0x0000000000400891 in _start ()

Report to https://bugs.kde.org/